Colorway in JavaScript

How to use colorway to set default trace colors in JavaScript with Plotly.

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function linspace(a,b,n) {
  return d3.range(n).map(function(i){return a+i*(b-a)/(n-1);});

const parabolaGen = (a, b) =>
  x => x*x*a + b;

var as = linspace(1, 3, 7);
var bs = linspace(2, 14, 7);
var x = linspace(-1, 3, 50);
var data = [];

for (i=0; i< as.length; i++ ){
    type: "scatter",
    mode: "lines",
    x: x,

var layout = {
  colorway : ['#f3cec9', '#e7a4b6', '#cd7eaf', '#a262a9', '#6f4d96', '#3d3b72', '#182844']

Plotly.newPlot('myDiv', data, layout);